# Relationship history for MSHA mine 0201905

Current hierarchy: **Lalor Vince → Kavco → Kavco**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Tall Stone & Supply Company Inc → Kavco; 1979-01-01 to 1985-04-22; source msha-controller-operator-history
- **controller_controls_mine:** Lomker Gerald → Kavco; 1979-01-01 to 1985-04-22; source msha-controller-operator-history
- **controller_controls_operator:** Lomker Gerald → Tall Stone & Supply Company Inc; 1979-01-01 to 1985-04-22; source msha-controller-operator-history
- **operator_operates_mine:** Kavco → Kavco; 1985-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lalor Vince → Kavco; 1985-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lalor Vince → Kavco; 1985-04-23 to current/open; source msha-controller-operator-history